Wärtsilä’s Interim Report January to March 2010 to be published 23 April 2010 at 8.30 a.m. local time

Wärtsilä Corporation

Stock exchange release

12 April 2010 at 1:30 PM E. Europe Standard Time

Wärtsilä Corporation will publish its Interim Report for the period January-March 2010 on Friday 23 April 2010 at 8.30 a.m. Finnish time. The interim report will be available on the company website at www.wartsila.com after publishing.

An analyst and press conference will be held on the same date, Friday 23 April 2010, at 10.45 a.m. Finnish time (8.45 a.m. UK time), at the Wärtsilä headquarters in Helsinki, Finland. The combined web- and teleconference will be held in English and can be viewed on the internet at the following address: http://194.79.19.108/webcasts/wartsila/

To participate in the teleconference please call: +44 (0)207 1620 177 and enter the Conference ID: 863163. If you want to ask questions during the teleconference, press the number 1 on your phone to register for a question and the # -key to withdraw a question. The event title for the call is: Results Q1. Please be ready to state your details and the name of the conference to the operator. If problems occur, please press the *-button followed by the 0-button. We would recommend that you would register to the conference in advance at the following address:
https://eventreg2.conferencing.com/webportal3/reg.html?Acc=158744&Conf=201392

An on-demand version of the webcast will be available on the company website later the same day.

About Wärtsilä

Wärtsilä is a global leader in smart technologies and complete lifecycle solutions for the marine and energy markets. By emphasising sustainable innovation, total efficiency and data analytics, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers.